Electric heater



E. N. BROWN.

ELECTRIC HEATER.

APPLlCATlON FILED OCT-1,1919.

1,336,021 Patented Apr. 6, 1920.

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UNITED STATES OFFIGE.

EDMUND N. BROWN, OF SAN FRANCISCO, CALIFORNIA.

ELECTRIC HEATER.

Application filed October 1, 1919.

To all whom it may concern Be it known that I, EDMUND N. BROWN, a citizen of the United States, and a resident of the city and county of San Francisco, State of California, have invented new and useful Improvements in Electric Heaters, of which the following is aspecification.

The object of this invention is to provide an electric heater producing a beam of heat, the heater to be adjustable so as to direct the beam of heat as may be desired.

A further object is attained by the reflector for the heat energy having an unbroken surface; and with the heat generating element mounted within a protective cage and fitted with small, reliable, and eflicient electrical connections thereto. Other objects will be apparent from the specifications.

By referring to the accompanying figures this invention will be made clear.

Figure 1 is a front view of the heater.

Fig, v2 is a side view, the upper portions being shown in section on the line H, II, of Fig. 1.

Fig. 3 shows the heating element and its mounting.

Figs. 4 and 5 are details of the electrical connections.

Throughout the figures similar numerals refer to like parts. 1 I

The numeral 1 indicates the standard carrying the Y frame 2, which frame supports axially the body of the heater from the adjustable pivots 3, 4. The body of the heater consists of the reflector-5, which presents its concave surface to the heating element 6 and to the corresponding concave surface of the second reflector 7 with the latter the heating element 6 is preferably assembled within the protecting cage 8. Two of the wires of this cage may be used as electric conductors to the heating element 6, as shown, for low voltage application, or may be insulated if desired for the usual commercial voltages, or separate insulated conductors may be employed lying close under the said wires. I have shown two of the wires of the said cage 8 so used,

Specification of Letters Patent.

Patented Apr. 6, 1920.

Serial No. 327,763.

shown in detail at 10 in Fig. 4, to illustrate the manner in which they are connected through the flange 15 of the reflector 5. The end of these wires as 10 I prefer to to a spring socket 16 preferably formed with saw-cuts as 17, so that the terminal of 10, when inserted, is tightly held therein forming a continuous electric path.

On the surface of 1.6, threads 18, are cut to secure its engagement with the insulated bushing 19, which may be held in place on the flange 15 by the locknut 20, the cord 21' forming one of the terminals of the electric supply from the double cord 22. The back member 23 provides a space between its interior surface and the exterior surface of the reflector 5 within which double cord 22 branches to the two wires 9, 10 through the connections as 16, and thence to the heating element 6.

The heating element 6 is arranged with respect to the concave surface and the secondary reflector 7, so that its heat energy waves are reflected from the said surface 7 on to the surface 5, from which they are again reflected out through the cage 8 as a beam or shaft of heat, following the well known physical laws of radiant energy waves.

The more accurately the curved surfaces of the reflectors 5 and 7 are formed and relatively located, and the more accurately the heating element 6 is located, the more will the waves of radiant energy be concentrated as parallel beam of heat. It is not always the aim, however, to make 6 a perfectly parallel beam, but rather one having some spread so that the surface against which the heat waves of the beam will impinge will be of somewhat larger area than the diameter of the reflector 5; but will nevertheless be retained as a distinctive beam. The direction of this beam may be adjusted. by swinging the body of the heater about'the pivots 3, 4, and clamping it in any desired position, as by the lock pivot 4.

The operation will be as follows:

Electric energy is conducted by the cord 22, having two conductors, one of which is indicated at 21, and thence through the two connectors at 16, and conductors 10 and 9,

to the heating element coil 6 through the terminals 13, 1 1. This heating element through its resistance transforms the electrical energy into heat energ which now radlates in straight lines to the surface of the reflector 5, and also from the heating ele-- from which the.

are reflected outwardly in the form of a,

beam. The direction of this beam may be .adjusted by altering the position of the body of the heaterabout the pivots 3 and 4:. I have shown the interior surface of the reflector 5 as that of a parabola, and that reflector 7 as spherical-concave, but I do not wish tobe understood as confining myselfto these forms, as any suitable curved surfaces may be employed.

Also I have shown the back member 23, which may be used toprovide a spacefor the electric conductors, and also as a heat insulation means from the back of the re Hector 5, which in some cases may attain a high temperature. However, it is obvious that the electrical connections 22 may be conveyed to the connectors 16 by any well known path, as up and through the base 1. Also I have shown two opposite guard or cage wires 9, 10 as conductors to supply the electric circuit to the heating element 6, whereas, independent connectors may be used t is also to'be understood thatthe connectors to the heating element 6, as '9, 10, 13, 14, may be used as sup-ports or independent connections and supports of other form may be inserted as required.

In usingindepeinlent connections or con ductors they may be laid adjacent to cage wires as 9, 10 and may of course be insulated in well known ways. Also if desired the wires 9, 10 forming part of the cage may if used as conductors and be insulated in any well known way.

I claim V r 1. In a radiant heater an electrical resistance adapted to radiate heat mounted betweenI'a relatively large and a relatively small radiant heat reflector, in combination with the said two reflectors, the larger of said reflectors adapted to receive the heat emanating from the resistance and from the smaller reflector, and to reflect the said heat' n a beam concentric about the periphery of the smaller reflector, and electrical circuit connectionsto the said resistance.

2. In a radiant heater an electrical resistance adapted to radiate heat mounted between arelatively large and a relatively vsmallradiant heat reflector, in combination with the saidtwo reflectors, the larger of the said reflectors adapted to receive the heat emanating from the resistance and from the smaller refl ctor and toreflect the said-heat the smaller reflector, and electrical circuit connections to the said resistance, and protective guard wires between the peripheries of the reflectors. V V

1-. In a radiant heater an electrical resistance adapted to radiate heat mounted between a relatively large and a relatively small radiantheat reflector, in combination with the said two reflectors, the larger of the said reflectors adapted to receive the heat emanating from the resistance and from the smaller reflector, and to reflect the said heat ina beam concentric about the periphery of the smaller reflector, and electrical circuit connections to the said resistance, one of the reflectors being of'substantially para bolic form as and for the purpose described.

5. In an electric heater a' heat'reflector and a relatively smaller reflector, said reflectors having their concave surfaces facing each other; a radiant electrical heat gener: ating element mounted between the reflectors, the said element and the smaller reflector disposed in position with respect to the larger reflectors so that the heat radiating and reflecting from them is reflected'from the surface of the larger reflectorin a beam of heat and supporting means for thereflectors and element.

6. In an electric heater a heat reflector surface of the larger reflector in a beam of heat, andsupporting means for the reflectors and element, and means for adpi'sting the direction of the beam of heat.-

7. In an electric heater a heat reflector and a relatively smaller reflector, said'reflectors-h r ng concave surfaces facing each other; a radiantelectrical heat generating element mountedjbetween the reflectors, the

said element and the smallerreflect'or disposed in position with respect to the larger reflectors so thatthe heat radiating andreflectmg from them is refleioted-from'the sarface of the larger reflector in a beam of heat, and supporting means for the reflectors and element, and means for adjusting the direction of the beam of heat vertically with respect to the supporting means.

8. In an electric heater comprising a pair of reflectors of relatively large and small size having their concave surfaces facing each other, a radiating heat element fixed between the reflectors and guard wires disposed between the periphery of the reflectors and means for completing an electric circuit through the heat element.

9. In an electric heater comprising a pair of reflectors of relatively large and small size having their concave surfaces facing each other, a radiating heat element fixed between the reflectors, and means for completing an electric circuit through the heat element, comprising two of the said guard wires constructed and adapted to support the heat element from the smaller reflector, with insulating means therefrom, and having electrical connection devices disposed at the periphery of the larger reflector and insulated therefrom.

10. In an electric heater comprising a pair of reflectors of relatively large and small size having their concave surfaces facing each other, a radiating heat element fixed between the reflectors and guard Wires disposed between the periphery of the reflectors, and means for completing an electric circuit through the heat element comprising two of the said guard Wires constructed and adapted to support the heat element from the smaller reflector, with insulating means therefrom, and having electrical connection devices disposed at the periphery of the larger reflector and insulated therefrom, adapted to removably engage the circuit Wires.

In testimony whereof I have hereunto set my hand at San Francisco, California, this 22nd day of September, 1919.

EDMUND N. BROWN.

In presence of- MIL'roN H. SHOENBERG. 

